Magnetic hyperfine field at diluted<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Fe</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>57</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>in vapor-quenched heavy-rare-earth films
作者:E. C. Passamani、E. Baggio-Saitovitch、H. Micklitz
DOI:10.1103/physrevb.55.12382
日期:——
In this work, we combine vapor-quenching technique at low temperature (20 K) and in situ Fe-57 Mossbauer spectroscopy at different temperatures (7-300 K) to study out-of-equilibrium solubility and magnetic properties of Fe-57(5 at. %) in some magnetic heavy-rare-earth (RE) metals (RE=Dy, Ho, Er, and Tm). The spectra were fitted using the full Hamiltonian including electric quadrupole and magnetic interactions. Two magnetic components are observed in the 7 K Mossbauer spectra: one with a magnetic hyperfine field (B-hf) varying between 5.3(2) and 1.9(2) T, which has been attributed to Fe at a substitutional site, and the other one, with a smaller field (<2.1 T), which is assumed to be due to Fe at an interstitial site. The behavior of B-hf for Fe at the substitutional site in the different RE metals scales with the de Gennes factor.